<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>对象学习</title>
    <script src="test.js"></script>
    <link rel="stylesheet" href="study.css">
</head>
<body>
    <button type="button" onclick="Object1()">对象实例1</button><br/>
    <button type="button" onclick="Object2()">对象实例2</button><br/>
    <button type="button" onclick="Object3()">对象实例3</button><br/>
    <button type="button" onclick="Person()">判断对象中是否存在某个元素</button><br/>

</body>
</html>